The porn fairy of the woods used to leave out magazines for boob men and the implants some of those women had were ludicrous. Not to mention every guy was roided out.
Glad there's been a push in society to be accepting again of people and their body types. Even if porn today still falls into the same tropes of the 80's and 90's.
Personal interest, higher rate of transphobes among people critical of the industry, and a lack of political education in feminist class analysis among Marxists are at least three reasons I can think of.